We're on Exchange Server 2010 SP2 UR2, and going through ISA Server 2006. I can confirm it does work with iOS6.0, but the email name (before the @) must match their AD username (FYI we have a .local UPN). Hope that helps someone!

Hi Clint, I can assure you the users UPN does not match their email address. The key to it (for us) was to set the ActiveSync IIS folder to use 'basic authentication' and make sure you set the 'default domain' to your internal NetBIOS name, failure to do this will stop autodiscover from filling out the details automatically.Regards,Terry

Because IOS6 does not ask for username you cannot enter domain\username which is required for the authentication. Only if your email address matches the UPN suffix can it authenticate using the email address instead of domain\username.

Regardless if you populate the Default Domain field or not within the Active Sync IIS folder, how are you going to authenticate if you do not have the field to enter the username?

Hi Clint, the username is derived from the email address, if we use an email that doesn't match the username it will fail e.g. username = terryj, so tj@domain.com will fail, but terryj@domain.com will authenticate successfully (but don't forget that default domain name!)HTHRegards,Terry

Hi Clint, there are no other UPN suffix's in our domain, just the .local UPN (our email addresses are .co.uk, so don't match the UPN).

I'd like to just state again, that iOS 5 and 6 works with autodiscovery in our environment. To help others who may google this in future, our setup:We're on Exchange Server 2010 SP2 UR2, and using ISA Server 2006 for all iPhone / iPad users.For IIS the default settings should already set (if not see here: http://blogs.technet.com/b/exchange/archive/2010/09/23/3411146.aspx), the ActiveSync folder should already be using 'basic authentication', just make sure you set the 'default domain' (for basic auth) to your internal NetBIOS name.I'm also assuming you've setup a different external URL for external users already (if not see: http://www.msexchange.org/articles_tutorials/exchange-server-2010/management-administration/exchange-autodiscover.html), we're using a wildcard cert and not a SAN cert, but it works just as well.ISA server is pretty easy to setup, just follow the many guides on the net, one point to note, break out autodiscovery on it's own, set Users to 'All Users', Authentication Delegation to either 'basic' or 'no delegation, but client may authenticate directly'. One thing that caught us out was in the listener -> Authentication -> Advanced -> Require all users to authenticate, was ticked (untick it or the All Users entry will not work).

Notice it tries the username first, THEN the email address? This is why it works using basic auth (and why it needs to match their AD account), in combination with the default domain name and the everyone permissions on the autodiscover folder in IIS.

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This is a great article. I too thought IOS6 and Autodiscover would not work. After playing with our Exchange this weekend, I can confirm these settings DO work! However there was one "gotcha" I'd like to throw out there for anyone else. When you set the "Default Domain" in IIS, you also MUST set "Realm" to the internal domain name as well. At first all I did was set the Default Domain and left Realm blank and it did not work. As soon as I set Realm, Autodiscover worked beautifully!!

Why are people still amazed that iOS 6 works with autodiscover? The guy never said it does not if you read the comments! The simple fact is that the UPN needs to match the users email address. If that is the case, autodiscover works fine. If, however, the logon name does NOT match the email address then there is absolutely no way the iOS device knows the logon name to use with the password and that is when autodiscover fails. It's as simple as that really. If the UPN matches the email and you have a default domain set in IIS then iOS works fine.

Does anyone know how to acomplish this in a multi-domain forest? Oyr root contains all the servervices for multiple companies. Therefor, we cannot use the default domain or realm. All our users login with UPN on all workstations and other access points. The UPN is bumbed against the AD until it is found so works with all companies. The suggestions I see here are only for single domain and will not work with multi domain. True?

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